This is a carbide router bit used to cut out the original curved window frames
Now the frames are clean and flat ready for the new template
I had to completely gut the interior due to dry-rot
New window with tempered flat glass and weather seal.
You can see the new frame for flat glass.
New window of flat tempered glass with new Stainless Steel clips.
Here I'm drying some cedar fencing I recycled milling it into tongue & groove flooring.